/* Fig. 5.3: fig05_03.c
   Creating and using a programmer-defined function */
#include <stdio.h>

int square( int y ); /* function prototype */

/* function main begins program execution */
int main( void )
{
   int x; /* counter */

   /* loop 10 times and calculate and output square of x each time */
   for ( x = 1; x <= 10; x++ ) {
      printf( "%d  ", square( x ) ); /* function call */
   } /* end for */

   printf( "\n" );

   return 0; /* indicates successful termination */
} /* end main */

/* square function definition returns square of parameter */
int square( int y ) /* y is a copy of argument to function */
{
   return y * y; /* returns square of y as an int */
} /* end function square */



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